<snip> > occasionally I get an exception raised (win32file.EscapeCommFunction > (self.hCommPort, > win32file.SETDTR), pywintypes.error : (5, 'EscapeCommFunction', 'Access is > Denied') ) From > what I can gather, this exception is raised when the resource in question (in > this case my serial > port) if already in use by another entity. Now that's fine, but no other > process / application on the > machine is (to the best of my knowledge) accessing this serial port. My > application is single > threaded. <snip>
I have had weird things happen if "somehow" Windows decides to turn on DTR handshaking when I am using a serial port (again with nobody else using the port). Try reading the status of DTR handshaking when you get the error and see if something toggled it on. I know you get some kind of error (but memory escapes me ...) setting/clearing DTR if handshaking is on. _______________________________________________ python-win32 mailing list python-win32@python.org http://mail.python.org/mailman/listinfo/python-win32
